64143630288 has 60 divisors (see below), whose sum is σ = 180443274180. Its totient is φ = 21270417408.

The previous prime is 64143630227. The next prime is 64143630289. The reversal of 64143630288 is 88203634146.

64143630288 is a `hidden beast` number, since 6 + 4 + 1 + 4 + 3 + 630 + 2 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41376441744 + 22767188544 = 203412^2 + 150888^2 .

It is a super-2 number, since 2×64143630288² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64143630289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126203 + ... + 1181786.

It is an arithmetic number, because the mean of its divisors is an integer number (3007387903).

Almost surely, 2^64143630288 is an apocalyptic number.

It is an amenable number.

64143630288 is an abundant number, since it is smaller than the sum of its proper divisors (116299643892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64143630288 is a wasteful number, since it uses less digits than its factorization.

64143630288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308196 (or 2308187 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

It can be divided in two parts, 64143 and 630288, that added together give a triangular number (694431 = T₁₁₇₈).

The spelling of 64143630288 in words is "sixty-four billion, one hundred forty-three million, six hundred thirty thousand, two hundred eighty-eight".